105mm nikon VR trouble

No not macro shots, just normal shots. I have the 24-120 VR and the 70-200 F/4 VR. When I press halfway to focus, I can see the image stabilize. Which is strange, because my son said he never noticed it with his lenses. I sent the macro back to Amazon, and ended up buying the previous version, the 105mm F2.8D from Ebay, which I will receive tommoroe